Why is the sky blue? What's the scientific reason?

Question

i don't need any answers saying "it just is", cuz that's gay, and stupid. thanx.

Answer 1

The Earth is covered with vast oceans of water. Water has a specific spectral effect. In industry they call it spectral analysis. The combination of H 2 O and mineral salt just happens to be Blue. NASA uses the ability of spectral analysis to determine the elements and mineral contents of planets and other cosmic material without having to take a sample.

Answer 2

The first thing to recognize is that the sun is an extremely bright source of light -- much brighter than the moon. The second thing to recognize is that the atoms of nitrogen and oxygen in the atmosphere have an effect on the sunlight that passes through them.

There is a physical phenomenon called Rayleigh scattering that causes light to scatter when it passes through particles that have a diameter one-tenth that of the wavelength (color) of the light. Sunlight is made up of all different colors of light, but because of the elements in the atmosphere, the color blue is scattered much more efficiently than the other colors.

So when you look at the sky on a clear day, you can see the sun as a bright disk. The blueness you see everywhere else is all of the atoms in the atmosphere scattering blue light toward you. (Because red light, yellow light, green light and the other colors aren't scattered nearly as well, you see the sky as blue.)

Answer 3

Spectral analysis devices show that when the Earth is viewed from Space it is blue. Land mass is of other colors other than Blue; but blue is dominate. Could that be because of all the water? Mars is Red could that be because it has no visible water? Saturn, Jupiter, what color is the skies there? You do not need science to tell you. A little thinking goes a long way in understanding.

Answer 4

It is because of the phenomenon called scattering of light when it strikes the molecules of the gases of atmosphere. The sunlight consists of 7 different colours and scattering power of each colour light is different. Some scatter more while others scatters less. The scattering power of every colour is some function of (i.e. depends on) the wavelength of that light. The scattering power of the blue colour is much larger then that of any other colour in sunlight. Thus, it scatters more and sky appears blue.

Answer 5

Kelsey stated the earth is roofed by technique of ninety% water. incorrect. the rather quantity coated by technique of all water is in effortless words seventy one%. the sea isn't the reason the sky is blue. What were you wondering and the position do you get your practise? Donald Trump?

Answer 6

Because the humidity in the atmosphere deflects the suns rays. It is the same as the prism experiment you did for optics. However the blue colour is the most less deflected colour. When the sun sets, the angle of suns rays changes and the spectrum shifts to yellow and orange. Thats why you see yellow sunsets.

Answer 7

The atmosphere consists of several gases, the most common being nitrogen. When light filters through the atmosphere, several colours of the spectrum are absorbed by the nitrogen, but blue comes through. That is the reason.

Answer 8

The sky is blue partly because air scatters short-wavelength light in preference to longer wavelengths. Combined, these effects scatter (bend away in all directions) some short, blue light waves while allowing almost all longer, red light waves to pass straight through. When we look toward a part of the sky not near the sun, the blue color we see is blue light waves scattered down toward us from the white sunlight passing through the air overhead. Near sunrise and sunset, most of the light we see comes in nearly tangent to the Earth's surface, so that the light's path through the atmosphere is so long that much of the blue and even yellow light is scattered out, leaving the sun rays and the clouds it illuminates red.

Scattering and absorption are major causes of the attenuation of radiation by the atmosphere. Scattering varies as a function of the ratio of the particle diameter to the wavelength of the radiation. When this ratio is less than about one-tenth, Rayleigh scattering occurs in which the scattering coefficient varies inversely as the fourth power of the wavelength. At larger values of the ratio of particle diameter to wavelength, the scattering varies in a complex fashion described, for spherical particles, by the Mie theory; at a ratio of the order of 10, the laws of geometric optics begin to apply.

Why is the sky blue instead of violet?
Because of the strong wavelength dependence (inverse fourth power) of light scattering according to Raleigh's Law, one would expect that the sky would appear more violet than blue, the former having a shorter wavelength than the latter. There is a simple physiological explanation for this apparent conundrum. Simply put, the human eye cannot detect violet light in presence of light with longer wavelengths. There is a reason for this. It turns out that the human eye's high resolution color-detection system is made of proteins and chromophores (which together make up photoreceptor cells or "Cone" structures in the eye's fovea) that are sensitive to different wavelengths in the visible spectrum (400 nm–700 nm). In fact, there are three major protein-chromophore sensors that have peak sensitivities to yellowish-green (564 nm), bluish-green (534 nm), and blue-violet (420 nm) light. The brain uses the different responses of these chromophores to interpret the spectrum of the light that reaches the retina.

When one experimentally plots the sensitivity curves for the three color sensors (identified here as long (L), middle (M), and short (S) wavelength), three roughly "bell-curve" distributions are seen to overlap one another and cover the visible spectrum. We depend on this overlap for color sensing to detect the entire spectrum of visible light. For example, monochromatic violet light at 400 nm mostly stimulates the S receptors, but also slightly stimulates the L and M receptors, with the L receptor having the stronger response. This combination of stimuli is interpreted by the brain as violet. Monochromatic blue light, on the other hand, stimulates the M receptor more than the L receptor. Skylight is not monochromatic; it contains a mixture of light covering much of the spectrum. The combination of strong violet light with weaker blue and even weaker green and yellow strongly stimulates the S receptor, and stimulates the M receptor more than the L receptor. As a result, this mixture of wavelengths is perceived by the brain as blue rather than violet.

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Answer 9

To add to Raven's good answer, the sky is not always blue. Watch a sunrise or sunset; often the sky is pink. At night it doesn't have a color at all.

Answer 10

The sun has rays of all the colors combined. When the rays hit earths atmosphere, the blue color is more prominant.